Inventor · disambiguated record
Robert J. Hagenbach
Also filed as: HAGENBACH ROBERT J
9 granted patents·238 citations·filing 1971–1989
89Inventor score
Files withXEROX CORP9
Top patents by PatentIndex Score
9 records- 0195US4076640APreparation of spheroidized particlesXEROX CORP·Filed 1975·Granted Feb 28, 1978·140 cites·8 claims
- 0291US4209550ACoating carrier materials by electrostatic processXEROX CORP·Filed 1976·Granted Jun 24, 1980·33 cites·7 claims
- 0387US3939086AHighly classified oxidized developer materialXEROX CORP·Filed 1974·Granted Feb 17, 1976·26 cites·9 claims
- 0460US5087545ACarrier and developer compositions generated from fly ash particlesXEROX CORP·Filed 1989·Granted Feb 11, 1992·12 cites·3 claims
- 0551US4018601AElectrostatographic magnetic brush imaging process employing carrier beads comprising high purity nickelXEROX CORP·Filed 1971·Granted Apr 19, 1977·6 cites·2 claims
- 0649US4223085ASemi-conductive nickel carrier particlesXEROX CORP·Filed 1976·Granted Sep 16, 1980·7 cites·12 claims
- 0743US4019842AApparatus for forming magnetite electrostatographic carriersXEROX CORP·Filed 1976·Granted Apr 26, 1977·8 cites·11 claims
- 0838US4894305ACarrier and developer compositions generated from fly ash particlesXEROX CORP·Filed 1986·Granted Jan 16, 1990·4 cites·71 claims
- 0927US4019903AElectrostatic developmentXEROX CORP·Filed 1973·Granted Apr 26, 1977·2 cites·11 claims
Join the waitlist — get patent alerts
Get an alert when Robert J. Hagenbach files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →